1//===-- Implementation of putc --------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/stdio/putc.h"
10#include "src/__support/File/file.h"
11
12#include "hdr/types/FILE.h"
13#include "src/__support/libc_errno.h"
14#include "src/__support/macros/config.h"
15#include <stddef.h>
16
17namespace LIBC_NAMESPACE_DECL {
18
19LLVM_LIBC_FUNCTION(int, putc, (int c, ::FILE *stream)) {
20 unsigned char uc = static_cast<unsigned char>(c);
21
22 auto result = reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->write(&uc, 1);
23 if (result.has_error())
24 libc_errno = result.error;
25 size_t written = result.value;
26
27 if (1 != written) {
28 // The stream should be in an error state in this case.
29 return EOF;
30 }
31 return 0;
32}
33
34} // namespace LIBC_NAMESPACE_DECL
35

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source code of libc/src/stdio/generic/putc.cpp